Suction Pipe Calculation
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1 Calculating t he dimension of suction pip es for one- pi pe sy st ems 2,5-120 kg /h When calculating the appropriate suction pipe dimension, pipe resistance and suction height must be taken into consideration. Different pipe dimensions allow different lengths of suction pipe. The tables below are only a recommendation, which show basic guidelines using theoretic values. Too low velocity will lead to air/gas separation from the oil resulting in large amounts of air/gas travelling to the pump causing noise and eventually flame failure. Using a suction pipe with an oversized inner diameter will result in a loss of the siphon effect in the descending parts of the suction pipe. If an oversized inner diameter is unavoidable, all ascending parts of the suction pipe must be calculated as suction height instead of simply figuring the height from the lowest level in the oil tank to the oil pump. Remember that suction height must not exceed 4 meter, as this will lead to noise and unnecessary wear and tear on the pump. The siphon effect must be calculated using the lowest potential flow in the suction pipe. For example, when using an oil burner with multiple effect stages, the lowest stage should be used to calculate siphon effect. The maximum effect stage should be used to calculate the pipe resistance. When calculating the appropriate suction pipe dimension, siphon effect should be taken into consideration. The figures below show siphon effect at different flow velocities. Inner diameter Siphon effect starts at 4 mm a flow > 1,6 kg/h 6 mm a flow > 5,5 kg/h 8 mm a flow > 20 kg/h 10 mm a flow > 35 kg/h The pipe system described below consists of a copper pipe, four elbows, a non-return valve, a shut-off valve and one Tigerloop Combi. When starting up with an empty pipe, simply press the reset button on the burner and the Tigerloop will automatically de-aerate the system. The oil pump should not run without oil for more than five minutes. The tables below indicate the total suction length in meter at different heights and nozzle capacities. In a one-pipe system, the flow of the suction pipe is identical to the nozzle capacity.
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Transcript of Suction Pipe Calculation
7/27/2019 Suction Pipe Calculation
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Calculating the dimension of suction pipes for one-pipe systems 2,5-120 kg/h
When calculating the appropriate suction pipe dimension, pipe resistance and suction height
must be taken into consideration. Different pipe dimensions allow different lengths of suction
pipe. The tables below are only a recommendation, which show basic guidelines usingtheoretic values. Too low velocity will lead to air/gas separation from the oil resulting in large
amounts of air/gas travelling to the pump causing noise and eventually flame failure.
Using a suction pipe with an oversized inner diameter will result in a loss of the siphon effect
in the descending parts of the suction pipe. If an oversized inner diameter is unavoidable, all
ascending parts of the suction pipe must be calculated as suction height instead of simply
figuring the height from the lowest level in the oil tank to the oil pump. Remember that
suction height must not exceed 4 meter, as this will lead to noise and unnecessary wear and
tear on the pump.
The siphon effect must be calculated using the lowest potential flow in the suction pipe. For
example, when using an oil burner with multiple effect stages, the lowest stage should be used
to calculate siphon effect. The maximum effect stage should be used to calculate the pipe
resistance.
When calculating the appropriate suction pipe dimension, siphon effect should be taken into
consideration. The figures below show siphon effect at different flow velocities.
Inner diameter Siphon effect starts at
4 mm a flow > 1,6 kg/h
6 mm a flow > 5,5 kg/h
8 mm a flow > 20 kg/h
10 mm a flow > 35 kg/h
The pipe system described below consists of a copper pipe, four elbows, a non-return valve, a
shut off valve and one Tigerloop Combi When starting up with an empty pipe simply press
7/27/2019 Suction Pipe Calculation
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Tank at the same level or below the burner
This table is valid for standard fuel oil with a viscosity of 6,0 mm2/s (cSt) (DIN 51603-1).
Heightin m
∅ 4
Inner mm
∅ 5
Inner mm
∅ 4
Inner mm
∅ 5
Inner mm
∅ 6
Inner mm
∅ 5
Inner mm
∅ 6
Inner mm
∅ 6
Inner mm
∅ 8
Inner mm
∅ 8
Inner mm
∅ 10
Inner mm
∅ 8
Inner mm
∅ 10
Inner mm
∅ 10
Inner mm
∅ 12
Inner mm
∅ 10
Inner mm
∅ 12
Inner mm
∅ 10
Inner mm
∅ 12
Inner mm
∅ 10
Inner mm
∅ 12
Inner mm
Max. pipe length in m
0,0 52 100 26 64 100 32 66 33 100 69 100 52 100 85 100 63 100 50 100 41 87
-0,5 46 100 23 56 100 28 58 29 92 61 100 45 100 74 100 55 100 44 92 36 77-1,0 39 97 19 48 100 24 50 25 79 52 100 39 97 64 100 48 100 38 80 31 66
-1,5 33 81 16 40 84 20 42 21 66 44 100 33 81 54 100 40 84 32 67 26 55
-2,0 27 66 13 33 68 16 34 17 54 36 88 26 66 43 91 32 68 25 54 21 44
-2,5 20 50 10 25 52 12 26 13 41 27 67 20 50 33 69 24 52 19 41 16 34
-3,0 14 35 7 17 36 8 18 9 28 19 47 14 35 23 48 17 36 13 28 10 23
-3,5 8 19 4 9 20 4 10 5 16 10 26 7 19 12 27 9 20 7 15 5 12
-4,0 1 4 0 2 4 1 2 1 3 2 5 1 4 2 5 1 4 1 2 0 2
Nozzle Cap.2,5 kg/h 5,0 kg/h 10 kg/h 20 kg/h 30 kg/h 40 kg/h 60 kg/h 80 kg/h 100 kg/h 120 kg/h
This table is valid for kerosene with a viscosity of 2,15 mm2/s (cSt) 2800 min-1.
Heightin m
∅ 4
Inner mm
∅ 5
Inner mm
∅ 4
Inner mm
∅ 5
Inner mm
∅ 6
Inner mm
∅ 4
Inner mm
∅ 5
Inner mm
∅ 5
Inner mm
∅ 6
Inner mm
∅ 6
Inner mm
∅ 8
Inner mm
∅ 6
Inner mm
∅ 8
Inner mm
∅ 8
Inner mm
∅ 10
Inner mm
∅ 8
Inner mm
∅ 10
Inner mm
∅ 8
Inner mm
∅ 10
Inner mm
∅ 8
Inner mm
∅ 10
Inner mm
Max. pipe length in m
0,0 100 100 78 100 100 39 96 47 99 65 100 48 100 100 100 76 100 60 100 49 100
-0,5 100 100 69 100 100 34 85 42 88 58 100 43 100 91 100 68 100 53 100 43 100
-1,0 100 100 61 100 100 30 74 36 77 51 100 37 100 80 100 59 100 46 100 37 96
-1,5 100 100 52 100 100 26 63 31 66 43 100 32 100 68 100 50 100 39 100 32 82
-2,0 100 100 43 100 100 21 53 26 54 36 100 26 86 56 100 41 100 32 83 26 68
-2,5 87 100 34 85 100 17 42 20 43 28 92 21 69 45 100 33 83 25 66 20 54
-3,0 65 100 26 64 100 12 31 15 32 21 69 15 51 33 84 24 62 18 48 14 39
-3,5 43 100 17 42 88 8 21 10 21 14 45 10 34 21 55 15 40 11 31 8 25
-4,0 21 53 8 21 44 4 10 4 10 6 22 4 16 10 27 6 19 4 14 2 11
Nozzle Cap.2,5 kg/h 5,0 kg/h 10 kg/h 20 kg/h 30 kg/h 40 kg/h 60 kg/h 80 kg/h 100 kg/h 120 kg/h
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